Application Example; Nozzle Loads - Mankenberg DM 462V Originalbetriebsanleitung

Original operating manual
Pressure reducing valve DM 462V / DM 462VG

Application example

Illustration 1:
1 Strainer
2 Shut-off valves
3 Pressure reducing valve*
4 Safety valve
Strainer
Optional, for fluids with particles.
Shut-off valves
Shut-off devices must be provided upstream and downstream of the pressure reducing valve for installation,
maintenance and tight system closure. When closing the shut-off devices, the valve upstream of the pressure
reducing valve must always be closed first. A bypass may be necessary for emergency operation.
Pressure reducing valve
The pressure reducing valve reduces the fluctuating higher inlet pressure of an operating medium to an
adjustable constant outlet pressure within a control deviation Pressure reducing valves are not shut-off devices
which ensure a tight valve closure.
Safety valve
For safety reasons, a safety valve must be installed on the outlet pressure side of the valve. It is dimensioned
and adjusted so that the maximum permissible outlet pressure (MAWP outlet) of the valve is not exceeded, see
nameplate.
Pressure gauge
A pressure gauge must be installed downstream of the pressure reducing valve in order to start up and adjust
the pressure reducing valve and to check whether the pressure reducing valve is depressurized.
Bypass for maintenance
For emergency operation or pressure tests in the plant, or for maintenance of the valve, a bypass is
recommended.

Nozzle loads

The forces and moments from the table of nozzle loads below are absorbed via the connections of the pipeline.
Forces and moments exceeding these values must be absorbed by other measures taken by the operator. The
support may only be provided at the connections and not at the body itself.
DM 462V / DM 462VG-4.X.231 Issue 30.06.2023
5 Pressure gauge
6 Connecting a leak line
7 Bypass
9